CVE-2018-7755

An issue was discovered in the fd_locked_ioctl function in drivers/block/floppy.c in the Linux kernel through 4.15.7. The floppy driver will copy a kernel pointer to user memory in response to the FDGETPRM ioctl. An attacker can send the FDGETPRM ioctl and use the obtained kernel pointer to discover the location of kernel code and data and bypass kernel security protections such as KASLR.

CVSS v3.0 5.5 MEDIUM
CVSS v2.0 2.1 LOW

5.5^/10

CVSS v3.0 : MEDIUM

Vector : AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

2.1^/10

CVSS v2.0 : LOW

Vector : AV:L/AC:L/Au:N/C:P/I:N/A:N

Exploitability : 3.9 / Impact : 2.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://lkml.org/lkml/2018/3/7/1116	Exploit Third Party Advisory
https://usn.ubuntu.com/3698-2/	Third Party Advisory
https://usn.ubuntu.com/3697-2/	Third Party Advisory
https://usn.ubuntu.com/3697-1/	Third Party Advisory
https://usn.ubuntu.com/3696-2/	Third Party Advisory
https://usn.ubuntu.com/3696-1/	Third Party Advisory
https://usn.ubuntu.com/3695-2/	Third Party Advisory
https://usn.ubuntu.com/3695-1/	Third Party Advisory
https://usn.ubuntu.com/3698-1/	Third Party Advisory
https://www.debian.org/security/2018/dsa-4308
https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html
https://access.redhat.com/errata/RHSA-2019:2043
https://access.redhat.com/errata/RHSA-2019:2029

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Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:12.04::::esm:::
	cpe:2.3:o:canonical:ubuntu_linux:17.10:::::::*
	cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::

Information

Published : 2018-03-07 23:29

Updated : 2018-10-04 03:29

NVD link : CVE-2018-7755

Mitre link : CVE-2018-7755

JSON object : View

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

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Products Affected

canonical

ubuntu_linux

linux

linux_kernel

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